typical mobil1 change doesn't cost more than a quick lube change. (always better and cheaper to do yourself). i noticed a good difference over dino, idles smoother, stays clean longer. there is also a possible power gain and it's better at withstanding heat than dino (important in a hot zetec). mechanics are used to the old school thought of dino being better, but it's an outdated idea. my dad's a mechanic and told me it's not worth it, but hopefully i can convince him to switch once he rebuilds the upper part of his v6 Ram. do a search on yahoo for synthetic oil myths, you'll find some good info.
